Blue-Ringed Octopus
The blue-ringed octopus is a highly toxic species of octopus. They commonly live in coral reefs and tide pools in the Indian and Pacific oceans. They have a distinct yellow skin with black and blue rings that change color when the octopus feels threatened. This octopus species is recognized as the most poisonous marine animal, with their venom containing a powerful neurotoxin that causes loss of sensation, paralysis, respiratory arrest, and heart failure. While the blue-ringed octopus is generally cute, small, and docile, it will attack if approached and provoked.